docs: def replace_nones(dict_or_list):
      """Update a dict or list in place to replace
      'none' string values with Python None."""
  
      def replace_none_in_value(value):
          if isinstance(value, basestring) and value.lower() == "none":
              return None
          return value
  
      items = dict_or_list.iteritems() if isinstance(dict_or_list, dict) else enumerate(dict_or_list)
  
      for accessor, value in items:
          if isinstance(value, (dict, list)):
              replace_nones(value)
          else:
              dict_or_list[accessor] = replace_none_in_value(value)